Computer Networking
Which of the following is an important characteristic of LAN?

parallel transmission
low cost access for low bandwidth channels
application independent interfaces
unlimited expansion
None of these

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Computer Networking
The Internet Control Message Protocol (ICMP)

allows gateways to send error a control messages to other gateways or hosts
All of these
reports error conditions to the original source, the source must relate errors to individual application programs and take action to correct the problem
None of these
provides communication between the Internet Protocol Software on one machine and the Internet Protocol Software on another

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Computer Networking
The main difference between synchronous and asynchronous transmission is

None of these
the bandwidth required is different
the pulse height is different.
the clocking is derived from the data in synchronous transmission
the clocking is mixed with the data in asynchronous transmission

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